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| Current "Thumper" oil pan drain plug. Head is too small (1/2"). Should be 7/8" |
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| Also note, the auto trans drain bolt |
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| Just FYI - this is an oil drain plug bolt from my '64 300hp - same thread as "Thumper" |
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| Good 'ol Orchard Supply test...it's a 1/2" - 20 Fine thread |
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